Alter keys on a simple one track timeline via code

I have a car that uses a single track timeline to animate a car object's position on a single axis. This track is very simple and contains 4 keys inside of an "Animation Track" that alter the car's x axis. As there are multiple cars in the scene, I'd like to give each one slightly different parameters which means I want to be able to alter the values and time of these keys in the object's Start(); before I Evaluate the PlayableDirector to start it.

How can I access the keys from code from the PlayableDirector?

This is as far as I got:

Code (csharp):

1.  
2.         director = this.GetComponent<PlayableDirector>();
3.         TimelineAsset timelineAsset = (TimelineAsset) director.playableAsset;
4.         TrackAsset track = timelineAsset.GetOutputTrack(0);
5.         AnimationTrack animTrack = (AnimationTrack) track;
6.         GameObject binding = (GameObject) director.GetGenericBinding(animTrack); //The GameObject this track is binded to (The car)
7.         var animator = binding.GetComponent<Animator>();
8.  
9.         //Something needs to happen here to get the AnimationCurve from the animator I think?
10.  
11.         AnimationCurve ac = new AnimationCurve();
12.         ac.keys[1].time = 10;
13.  

 

Thanks, I'll give this a try.